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OnStep MaxPCB Version 2, printed circuit board Sold!

Price - $10.00

Ad Number: 182244

Posted: 03 Sep 2019

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I have a few of these boards left from the last order. Get 'em while they last!!
$10 for one board and $5 for each additional board sent in the same package.
Shipped 1st class post to US. Other destinations or shipping methods, buyer pays actual shipping cost.
PayPal or Postal Money Order, (cash option if local pickup in/near 91901)
If you need 10 or more boards for a club or group build, let me know how many & I'll figure what sort of discount is possible.
Here's the main link for this open source hardware/firmware project:
This hardware/firmware can control GEM, Alt/Az, or Fork mounts
Built on a Teensy 3.5 or Teensy 3.6 microcontroller module
Plenty of processing power for rapid slewing & keeping up with high resolution encoders
Through hole components, no smc parts. Easy assembly with moderate soldering skills.
Drives up to 4 steppers:
Axis 1 - RA or Az
Axis 2 - Dec or Alt
Axis 3 - Focuser
Axis 4 - De-Rotator or Second Focuser
Uses widely available & affordable "polulu" style stepper driver modules. TMC2130/TMC2100 recommended
Operates in open loop mode (counting steps), or add encoders for full closed loop control!
WiFi and bluetooth for control via Android/iPhone apps or PC.
ASCOM drivers and LX200 emulation, compatible with a wide range of astro software
ST4 port for guiding or connecting the "Smart Hand Controller" for stand alone operation w/o a PC
Modular design, save money by adding only the functionality you need for your application.
Read the wiki at the above link, there's LOTS more info!
Components are available from Amazon, eBay, Alliexpress, Mouser, digikey, etc.
Mine is still being tested on the bench, so don't have a final cost. But, with careful shopping, you should be able to build the basic controller for $80 - $120 depending on the options you include.


  • Condition New, unpopulated PCB
  • Location California

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